Invention Grant
- Patent Title: Drive circuit for power semiconductor element
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Application No.: US14898488Application Date: 2013-06-24
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Publication No.: US09712155B2Publication Date: 2017-07-18
- Inventor: Yoshitomo Hayashi , Masahiro Ozawa , Toshiki Tanaka
- Applicant: Mitsubishi Electric Corporation
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Agent Richard C. Turner
- International Application: PCT/JP2013/067287 WO 20130624
- International Announcement: WO2014/207811 WO 20141231
- Main IPC: H03K17/30
- IPC: H03K17/30 ; H03K17/60 ; H02M1/44 ; H03K17/16 ; H02M1/00

Abstract:
A drive circuit for a power semiconductor element includes: a voltage-command generation unit that generates a voltage command VGEref, which is a charge command between the gate and emitter terminals of a power semiconductor element; and a subtracter that calculates a deviation voltage Verr between the voltage command VGEref and the voltage between the gate and emitter terminals. The drive circuit also includes: a gate current controller that is input with the deviation voltage Verr and calculates a gate-current command voltage VIGref for determining the gate current that is caused to flow to the gate terminal of the power semiconductor element; a gate-current command limiter that limits the gate-current command voltage VIGref; and a gate-current supply device that is input with an actual gate-current command voltage VIGout and that supplies a gate current to the gate terminal of the power semiconductor element.
Public/Granted literature
- US20160134277A1 DRIVE CIRCUIT FOR POWER SEMICONDUCTOR ELEMENT Public/Granted day:2016-05-12
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